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Definition of leucism
: an abnormal condition of reduced pigmentation affecting various animals (such as birds, mammals, and reptiles) that is marked by overall pale color or patches of reduced coloring and is caused by a genetic mutation which inhibits melanin and other pigments from being deposited in feathers, hair, or skin
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Recent Examples of leucism from the Web
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There are three ways this can occur: albinism, leucism, and isabellinism.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'leucism'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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